mirror of
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145 lines
5.9 KiB
JavaScript
145 lines
5.9 KiB
JavaScript
/*
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Copyright 2019 The Matrix.org Foundation C.I.C.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import { diffDeletion, diffAtCaret } from "../../src/editor/diff";
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describe('editor/diff', function() {
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describe('diffDeletion', function() {
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describe('with a single character removed', function() {
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it('at start of string', function() {
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const diff = diffDeletion("hello", "ello");
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expect(diff.at).toBe(0);
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expect(diff.removed).toBe("h");
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});
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it('in middle of string', function() {
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const diff = diffDeletion("hello", "hllo");
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expect(diff.at).toBe(1);
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expect(diff.removed).toBe("e");
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});
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it('in middle of string with duplicate character', function() {
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const diff = diffDeletion("hello", "helo");
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expect(diff.at).toBe(3);
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expect(diff.removed).toBe("l");
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});
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it('at end of string', function() {
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const diff = diffDeletion("hello", "hell");
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expect(diff.at).toBe(4);
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expect(diff.removed).toBe("o");
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});
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});
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describe('with a multiple removed', function() {
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it('at start of string', function() {
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const diff = diffDeletion("hello", "llo");
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expect(diff.at).toBe(0);
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expect(diff.removed).toBe("he");
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});
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it('removing whole string', function() {
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const diff = diffDeletion("hello", "");
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expect(diff.at).toBe(0);
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expect(diff.removed).toBe("hello");
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});
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it('in middle of string', function() {
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const diff = diffDeletion("hello", "hlo");
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expect(diff.at).toBe(1);
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expect(diff.removed).toBe("el");
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});
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it('in middle of string with duplicate character', function() {
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const diff = diffDeletion("hello", "heo");
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expect(diff.at).toBe(2);
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expect(diff.removed).toBe("ll");
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});
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it('at end of string', function() {
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const diff = diffDeletion("hello", "hel");
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expect(diff.at).toBe(3);
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expect(diff.removed).toBe("lo");
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});
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});
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});
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describe('diffAtCaret', function() {
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it('insert at start', function() {
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const diff = diffAtCaret("world", "hello world", 6);
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expect(diff.at).toBe(0);
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expect(diff.added).toBe("hello ");
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expect(diff.removed).toBeFalsy();
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});
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it('insert at end', function() {
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const diff = diffAtCaret("hello", "hello world", 11);
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expect(diff.at).toBe(5);
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expect(diff.added).toBe(" world");
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expect(diff.removed).toBeFalsy();
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});
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it('insert in middle', function() {
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const diff = diffAtCaret("hello world", "hello cruel world", 12);
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expect(diff.at).toBe(6);
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expect(diff.added).toBe("cruel ");
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expect(diff.removed).toBeFalsy();
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});
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it('replace at start', function() {
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const diff = diffAtCaret("morning, world!", "afternoon, world!", 9);
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expect(diff.at).toBe(0);
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expect(diff.removed).toBe("morning");
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expect(diff.added).toBe("afternoon");
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});
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it('replace at end', function() {
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const diff = diffAtCaret("morning, world!", "morning, mars?", 14);
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expect(diff.at).toBe(9);
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expect(diff.removed).toBe("world!");
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expect(diff.added).toBe("mars?");
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});
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it('replace in middle', function() {
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const diff = diffAtCaret("morning, blue planet", "morning, red planet", 12);
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expect(diff.at).toBe(9);
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expect(diff.removed).toBe("blue");
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expect(diff.added).toBe("red");
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});
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it('remove at start of string', function() {
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const diff = diffAtCaret("hello", "ello", 0);
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expect(diff.at).toBe(0);
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expect(diff.removed).toBe("h");
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expect(diff.added).toBeFalsy();
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});
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it('removing whole string', function() {
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const diff = diffAtCaret("hello", "", 0);
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expect(diff.at).toBe(0);
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expect(diff.removed).toBe("hello");
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expect(diff.added).toBeFalsy();
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});
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it('remove in middle of string', function() {
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const diff = diffAtCaret("hello", "hllo", 1);
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expect(diff.at).toBe(1);
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expect(diff.removed).toBe("e");
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expect(diff.added).toBeFalsy();
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});
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it('forwards remove in middle of string', function() {
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const diff = diffAtCaret("hello", "hell", 4);
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expect(diff.at).toBe(4);
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expect(diff.removed).toBe("o");
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expect(diff.added).toBeFalsy();
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});
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it('forwards remove in middle of string with duplicate character', function() {
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const diff = diffAtCaret("hello", "helo", 3);
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expect(diff.at).toBe(3);
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expect(diff.removed).toBe("l");
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expect(diff.added).toBeFalsy();
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});
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it('remove at end of string', function() {
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const diff = diffAtCaret("hello", "hell", 4);
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expect(diff.at).toBe(4);
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expect(diff.removed).toBe("o");
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expect(diff.added).toBeFalsy();
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});
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});
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});
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